I did a search for "won't roll up", but was surprised to get no hits:

My driver's side window won't crank up. Even though I crank the handle, it just sits there. I can grasp it with my palms, both inside and out, and pull it up. I'm going to read my shop manual to see what Mr. Goodwrench has to say about it, but I'd love to know what real life experience has to say. Anyone have this problem before? How is it fixed?

Bill